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This document usesPHP Chinese website manualRelease
在头文件 |
|
|
---|---|---|
int iswprint(wint_t ch); |
|
(自C95以来) |
检查给定的宽字符是否可以打印,即它是数字(0123456789
),大写字母(ABCDEFGHIJKLMNOPQRSTUVWXYZ
),小写字母(abcdefghijklmnopqrstuvwxyz
),标点符号(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
),空格还是特定于当前C语言环境的任何可打印字符。
CH |
- |
宽字符 |
---|
如果可以打印宽字符,则为非零值,否则为零。
#include#include #include #include int main(void){ wchar_t c = L'\u2002'; // Unicode character 'EN SPACE' printf("in the default locale, iswprint(%#x) = %d\n", c, !!iswprint(c)); setlocale(LC_ALL, "en_US.utf8"); printf("in Unicode locale, iswprint(%#x) = %d\n", c, !!iswprint(c)); wchar_t c2 = L'\x82'; // break permitted printf("in Unicode locale, iswprint(%#x) = %d\n", c2, !!iswprint(c2));}
输出:
in the default locale, iswprint(0x2002) = 0in Unicode locale, iswprint(0x2002) = 1in Unicode locale, iswprint(0x82) = 0
C11标准(ISO / IEC 9899:2011):
7.30.2.1.8 iswprint函数(p:450)
C99标准(ISO / IEC 9899:1999):
7.25.2.1.8 iswprint函数(p:396)
isprint |
检查一个字符是否是打印字符(功能) |
---|
| 用于iswprint的C ++文档 |
ASCII 值 (十六进制) |
字符 |
iscntrl iswcntrl. |
isprint iswprint. |
isspace iswspace. |
isblank iswblank. |
isgraph iswgraph. |
ispunct iswpunct. |
isalnum iswalnum. |
isalpha iswalpha. |
isupper iswupper. |
islower iswlower. |
isdigit iswdigit. |
isxdigit iswxdigit. |
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 - 8 |
0x00-0x08 |
控制码 (NUL, etc.) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
9 |
0x09 |
tab (\t) |
≠0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
10 - 13 |
0x0A-0x0D |
空格 (\n,\v,\f,\r) |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
14 - 31 |
0x0E-0x1F |
控制码 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
32 |
0x20 |
space |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
33 - 47 |
0x21-0x2F |
!"#$%&'()*+,-./ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
48 - 57 |
0x30-0x39 |
0123456789 |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
≠0 |
≠0 |
58 - 64 |
0x3a-0x40 |
:;<=>?@ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
65 - 70 |
0x41-0x46 |
ABCDEF |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
≠0 |
71 - 90 |
0x47-0x5A |
GHIJKLMNOPQRSTUVWXYZ |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
91 - 96 |
0x5B-0x60 |
[]^_` | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | |
||||||||||||
97 -102 |
0x61-0x66 |
abcdef |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
≠0 |
103-122 |
0x67-0x7A |
ghijklmnopqrstuvwxyz |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
0 |
123-126 |
0x7B-0x7E |
{|}~ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
127 |
0x7F |
退格(DEL) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
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在头文件 |
|
|
---|---|---|
int iswdigit(wint_t ch); |
|
(自C95以来) |
检查给定的宽字符是否对应(如果缩小)十个十进制数字字符0123456789中的一个。
CH |
- |
宽字符 |
---|
如果宽字符是数字字符,则为非零值,否则为零。
iswdigit
与iswxdigit
是唯一不受当前安装的C语言环境影响的标准宽字符分类函数。
一些语言环境提供了检测非ASCII数字的附加字符类。
#include#include #include #include void test(wchar_t a3, wchar_t u3, wchar_t j3){ printf(" '%lc' '%lc' '%lc'\n", a3, u3, j3); printf("iswdigit %d %d %d\n", !!iswdigit(a3), !!iswdigit(u3), !!iswdigit(j3)); printf("jdigit: %d %d %d\n", !!iswctype(a3, wctype("jdigit")), !!iswctype(u3, wctype("jdigit")), !!iswctype(j3, wctype("jdigit")));} int main(void){ wchar_t a3 = L'3'; // the ASCII digit 3 wchar_t u3 = L'三'; // the CJK numeral 3 wchar_t j3 = L'3'; // the fullwidth digit 3 setlocale(LC_ALL, "en_US.utf8"); puts("In American locale:"); test(a3, u3, j3); setlocale(LC_ALL, "ja_JP.utf8"); puts("\nIn Japanese locale:"); test(a3, u3, j3);}
输出:
In American locale: '3' '三' '3'iswdigit 1 0 0jdigit: 0 0 0 In Japanese locale: '3' '三' '3'iswdigit 1 0 0jdigit: 0 0 1
C11标准(ISO / IEC 9899:2011):
7.30.2.1.5 iswdigit函数(p:449)
C99标准(ISO / IEC 9899:1999):
7.25.2.1.5 iswdigit函数(p:395)
isdigit |
检查一个字符是否是一个数字(功能) |
---|
| 用于iswdigit的C ++文档 |
ASCII 值 (十六进制) |
字符 |
iscntrl iswcntrl. |
isprint iswprint. |
isspace iswspace. |
isblank iswblank. |
isgraph iswgraph. |
ispunct iswpunct. |
isalnum iswalnum. |
isalpha iswalpha. |
isupper iswupper. |
islower iswlower. |
isdigit iswdigit. |
isxdigit iswxdigit. |
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 - 8 |
0x00-0x08 |
控制码 (NUL, etc.) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
9 |
0x09 |
tab (\t) |
≠0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
10 - 13 |
0x0A-0x0D |
空格 (\n,\v,\f,\r) |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
14 - 31 |
0x0E-0x1F |
控制码 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
32 |
0x20 |
space |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
33 - 47 |
0x21-0x2F |
!"#$%&'()*+,-./ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
48 - 57 |
0x30-0x39 |
0123456789 |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
≠0 |
≠0 |
58 - 64 |
0x3a-0x40 |
:;<=>?@ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
65 - 70 |
0x41-0x46 |
ABCDEF |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
≠0 |
71 - 90 |
0x47-0x5A |
GHIJKLMNOPQRSTUVWXYZ |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
91 - 96 |
0x5B-0x60 |
[]^_` | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | |
||||||||||||
97 -102 |
0x61-0x66 |
abcdef |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
≠0 |
103-122 |
0x67-0x7A |
ghijklmnopqrstuvwxyz |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
0 |
123-126 |
0x7B-0x7E |
{|}~ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
127 |
0x7F |
退格 (DEL) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |